New Built-in Mailer Feature

The old [TCP] built-in mailer is not available. Use the P=[IPC] built-in mailer instead. The interprocess communications ([IPC]) built-in mailer now enables delivery to a UNIX domain socket on systems that support it. You can use this mailer with LMTP delivery agents that listen on a named socket. An example mailer might resemble the following.

Mexecmail, P=[IPC], F=lsDFMmnqSXzA5@/:|, E=\r\n, 
S=10, R=20/40, T=DNS/RFC822/X-Unix, A=FILE /var/run/lmtpd

The first mailer argument in the [IPC] mailer is now checked for a legitimate value. The following table provides possible values for the first mailer argument.

Table 24-20 Possible Values for the First Mailer Argument

New Rule Sets

The following table lists the new rule sets and describes what the rule sets do.

Table 24-21 New Rule Sets

The following list describes new rule set features.

• Numbered rule sets are also named, but the rule sets can still be accessed by their numbers.

• The H header configuration file command allows for a default rule set to be specified for header checks. This rule set is called only if the individual header has not been assigned its own rule set.

• Comments in rule sets (that is, text within parentheses) are not removed if the configuration file version is nine or greater. For example, the following rule matches the input token (1), but does not match the input token.

  R$+ (1) $@ 1

  
  

• sendmail accepts the SMTP RSET command even when it rejects commands because of TCP wrappers or the check_relay rule set.

• You receive a warning if you set the OperatorChars option multiple times. Also, do not set OperatorChars after the rule sets are defined.

• The name of the rule set, as well as its lines, are ignored if an invalid rule set is declared. The rule set lines are not added to S0.

Changes to Files

Note the following changes.

• The helpfile is now located in /etc/mail/helpfile. The old name (/etc/mail/sendmail.hf) has a symbolic link that points to the new name.

• The trusted-users file is now located in /etc/mail/trusted-users. During an upgrade, if the old name (/etc/mail/sendmail.ct) is detected, but not the new name, a hard link from the old name to the new name is created. Otherwise, no change is made. The default content is root.

• The local-host-names file is now located in /etc/mail/local-host-names. During an upgrade, if the old name (/etc/mail/sendmail.cw) is detected, but not the new name, a hard link from the old name to the new name is created. Otherwise, no change is made. The default content is zero length.

• The new name for /usr/lib/mail/cf/main-v7sun.mc is /usr/lib/mail/cf/main.mc.

• The new name for /usr/lib/mail/cf/subsidiary-v7sun.mc is /usr/lib/mail/cf/subsidiary.mc.

IPv6 Addresses in Configuration

In version 8.12 of sendmail, IPv6 addresses that are used in configuration should be prefixed with the IPv6: tag to identify the address properly. If you are not identifying an IPv6 address, a prefix tag is not used.

Changes to mail.local

The following table describes the new command-line options for the mail.local program, which is used by sendmail as a delivery agent for local mail.

Table 24-22 New Command-Line Options for mail.local

mail.local is the default for LMTP mode. However, for this release, if you choose to use mail.local as the local delivery agent without being in LMTP mode, you need to do one of the following to set the S flag.

Use the following syntax for the configuration file.

MODIFY_MAILER_FLAGS(`LOCAL', `+S')      # for the configuration file

Alternately, perform the following two steps for m4 configuration.

define(`MODIFY_MAILER_FLAGS', `S')dnl   # first step
MAILER(local)dnl                        # second step

Note - MODIFY_MAILER_FLAGS is a new macro that is used to build the configuration file. For details, refer to New Macros Used to Build the sendmail Configuration File.

For a complete review, refer to the mail.local(1M) man page.

Changes to mailstats

The mailstats program, which provides statistics on mailer usage, is packaged with the sendmail program. The following table describes new options in mailstats.

Table 24-23 New mailstats Options

For more information, refer to the mailstats(1) man page.

Changes to makemap

The makemap command creates keyed database files for sendmail. The following table describes new makemap options. When you declare options, use the following syntax.

makemap options class filename

When you use the preceding syntax, remember the following.

• options are preceded by a dash (for example, -dN).

• class refers to the type of database (for example, btree, dbm, or hash).

• filename refers to the full path (or relative name) for the database file.

Table 24-24 New makemap Options

Note - If makemap is running as root, the ownership of the generated maps is automatically changed to the TrustedUser, as specified in the sendmail configuration file. For more information about the TrustedUser option, refer to Table 24-2.

For more information, refer to the makemap(1M) man page.